Electronic Principles
A high-pass filter:

passes higher-frequency signals and reduces lower-frequency signals
None of these
increases the level of all frequencies by a significant amount
has no effect on ac signals
passes lower-frequency signals and reduces higher-frequency signals

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Electronic Principles
What is the difference between a conductor and an insulator?

None of these
An insulator allows current to flow much easier than a conductor does
A conductor allows current to flow much easier than an insulator does
The difference between conductors and insulators depends on how they are used
An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all

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Electronic Principles
Which one of the following is a statement of Kirchhoffs current law?

The algebraic sum of currents entering and leaving a point is equal to zero
The algebraic sum of currents in a loop is equal to zero
The total current in a parallel circuit is less than the value of the smallest current
The current through a resistance is proportional to the value of resistance and the IR drop across it
None of these

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